Wrench.



O. URBACH.

WRENCH.

Patented J an. 5, 1915.

My 72035051 J22 veniozr- THE NORRIS PETERS CO.. PHOTOLITHOH WASHINGTONv D. C.

OTTO URBACH, OF KRAWINKLERBR'U'OKE, GERMANY.

WRENCH.

Specification of Letters Patent.

Patented J an. 5, 1915..

Application filed April 2, 1914. Serial No. 829,047.

To all whom it may concern:

Be it known that I, O'r'ro URBAGH, of Krawinklerbriicke, Rhenish Prussia, Germany, a subject of the Emperor of Germany, have invented new and useful Improvements in Wrenches, of which the following is a specification.

This invention relates to wrenches for pipes and nuts and the like of the kind in which the pipe is seized by two jaws, one of them being solid and the other in form of a toothed roller, which roller moves u and down in corresponding teeth of the solid aw.

My invention is more clearly shown on the accompanying drawings in which,

Figures 1-2 show one form of carrying out the new wrench, Figs. 3-4 a modified construction.

Referring to said figures a is the stem of the wrench ending in a handle I) and in the solid jaw c, which being of angular shape is provided with teeth as shown, 9 is the movable jaw which according to this invention has the shape of a toothed roller having preferably skew teeth meshing with similar teeth out into the stem or shaft a. Said jaw g is turnably secured on a bolt 7" which is rigidly journaled in a U shaped bearing 6, that embraces the shaft a and is slidable thereon. Said jaw g is recessed as shown in Fig. 2 in order to receive a spiral spring m, one end of which is fastened to the jaw g and the other to the said bolt f and as will be readily understood the jaw g is forced by the said spring against the solid jaw 0 and a pipe d or similar article can be seized by the said jaw g and strongly held thereby,

the spring however having nothing to do with the pressing action it is only for the purpose of having the mouth of the wrench closed.

In the modification shown in Figs. 3 and 4 the shaft a is made of sheet metal and pressed in U shape. The solid jaw and the rock it forms one hook-shaped piece is which is inserted into the U shaped upper portion of the wrench and joined therewith by the rivets z'. The movable jaw g which contains the spring m as before described is guided between the upright shanks of the U shaped shaft a and by this construction the said jaw 9 may be made much greater in diameter and at the same time not permitted to engage the face of the rigid jaw.

What I claim and desire to secure by Letters Patent is:

In. a wrench, a wrench shank, having teeth, forming one end teeth formed on a a curved jaw of the shank, portion of the shank, a yoke embracing the shank, a shaft connecting the ends of the yoke, a toothed roller journaled on the shaft, the teeth of the roller cooperating with the teeth of the shank, the roller having a recessed portion, a coil spring housed in the recess, one end of the spring being secured to the roller, and the opposite end being secured to the shaft to provide a rotary movement of the roller, for normally holding the roller into engagement with the stationary jaw.

orro URBACH. 1. 8.]

women of thin patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. G. 

